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(No Model.) 2 Sheets--Sheet 1. A. SHEDLOGK. RDGK DRILLING MAGHINE.

1%.. 282,382. Patented July 31,1883.

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2 SheetsSheet 2.

K O O L D E S L m m M 0 W l ROCK DRILLING MACHINE. No. 282,382.

Patented July 31, 1883.

l ll N. PETERS. vhnw-mhn n hur. Washington, D c

To all whom it may concern.-

PATENT OFFICE.

ALFRED sHEDLooK, OF BROOKLYN,

NEWV YORK, ASSIGNOR TO JOHN D.

SHEDLOOK, on SAME PLACE.

ROCK-DRILLING \MACHINE.

SPECIFICATION forming part of Letters Patent No. 282,382, dated July 31,1883.

Application filed November 27, 1882. No model.)

Be it known that I, ALFRED SHEDLOOK, of Brooklyn, county of Kings, Stateof New York, have invented certain new and useful Improvements inRock-Drilling Machines, ofwhich the following is a specification.

The rock-drilling machine forming the sub ject of this invention isdesigned for drilling holes in a downward direction. The constructionand operation of the same will be fully understood by reference had tothe accompanying drawings, in which- Figure 1, Sheet 1, is a sideelevation. Fig. 2, Sheet 1, is a plan view. Fig. 3, Sheet 2, is a sideelevation of the body, &c., partly in section, on an enlarged scale-Fig. 4., Sheet 2, is a vertical section cut through the line a: m, Fig.3. Fig. 5, Sheet 2, is a transverse section taken on the line y Fig. 6,Sheet 1, is

atransverse section taken on the line 2 z. Fig. 7, Sheet 2, is adetached view of the drillchuck; and Figs. 8, 9, 10, and 11, Sheet 2,are illustrative diagrams, showing the develop ment of the actuating camand device for causing the rotation of the drill.

The frame of the machine consists of two vertical guide-bars, wand a,fitted at their upper ends to the head-piece a and at their lower endsto the foot-piece a, which is provided with a supporting-point, c To theheadpiece a is secured, by means of bolts and nuts If I)", thebracing-bars band b, connected together by the cross-brace b, and to thefootpiece a is secured, by means of bolts and nuts 0 0 the twocurvedbars c and c, whichare pointed and curved outwardly at their ends,as shown at Fig. 2, so as to provide a broad base for the machine. Thebracing-bars b and b and the curved bars a and c, on each side of themachine, are clamped together by the double yokes o? 0, adapted to allowthe bars to be moved in relation to one another, so that the pointedends of the curved bars 0' and 0 may be adjusted to meet uneven parts ofthe rock, as shown at Fig l, and be held firmly, when adjusted, by meansof the set-screws 'which pass through the sides of the double yokes c c.The nuts of the bolts and nuts If b and c c are also tightened when theframe is adjusted inthe desired position. It will be observed that theguide-bars a, and a may be set in a vertical position, .or at a fewdegrees on either side of the vertical, which are the only direction ofholes the machine is designed to drill. On the cross-brace b is attachedthe seat (Z by means of the hooks d d,

- so that it is readily removed to allow the machine to be fixed tooccupy small spaces for transportation, &c., the bracingbars b and b andcurved bars 0 and 0 being then folded alongside the guide-bars a and aby sliding the bars 6 and I) out of the double yokes c c". All of theprincipal operating parts of the machine are located in the cylindricalbody 6, and all of the movements necessary to' the proper working of thedrill are accomplished by means of one cam. 1

The body 0 is provided with four lugs, e e,

throu h which the uide-bars a and'a ass b b p 7 audit has a cap, 6",screwed into the upper end of it. In the center of this cap 6 works thebush-bearing), having a square hole formed through it, and ascrew-thread on its lower end, by which it is secured to the doubleperipherial cam g, which, when rotated, acts against the two rollers ith on studs secured, to theinside of the upper end of the" drillholder t.This drill-holder is shown as being cylindrical in form, and having aneck, t", at

its lower end, fitted to rotate and slide longi-' tudinally in a hole inthe bottom of the body e, and in the extreme end of this neck a" isformed a hole in which the shank of the drill thereto by means of theyoke-clutch 76, formed, as shown at Fig. 7, with two inclined sides, oneof which fits into a groove cut through the side of the necki into thehole in which the shank of the drill j is placed, so as to press againstthe shank, and the other one bears against the back of the neck i whenthe setscrew 7c is forced against the neck, so that a wedging action isthereby employed to hold thedrill firmly in the neck i, and as there arethree points of contact the liability of the drill becoming loose isreduced to a minimum.

To cause the drill to be partly rotated after each stroke, two series ofribs, Z and m, are

formed on the inside of the body 0, the num, ber of ribs in each seriesbeing equal to the number of strokes the drill is designed to makeduring one revolution, which in the present j is fitted, said drillbeing securely attached case is eleven, and on the outside of thedrillholder tare formed ribs or projections 91, so located as to bearagainst the ribs Z or m. There may be as many of these projections n asthere are ribsin each series, but four only are shown, as affordingsufficient wearing-surface. The upper series of ribs, m. are placedopposite the spaces between the lower series of ribs, Z, and the actionof the projections a thereon when the cam g is rotated will behereinafter explained. I i

The cam g is rotated by means of the square shaft 0, secured to thebevel-wheel, p, fitted to rotate in the center of theheadpiece a of theframe, and into this wheel meshes the bevelwheel q, secured to thehorizontal shaft q, also having its bearings in headpiece a and to theends of which are secured the crank-handles r. The wheel 1 bears suchrelation as to size to the wheel 1) that one full revolution of thehandles produces two strokes of the drill, as will be hereinafterexplained.

Inside the drill-holder 1?, between its lower end and the washers,bearing against the bottom of the cam y, is placed the spiral spring 8.It will be observed that by arranging the working parts on a common axisall pressure due to the compression of the spring 8 when the cam g isrotated is resisted by the metal of the cam between its under side andthe faces of its rises, thereby leaving the cam-bearing f free to rotatein the cap 6 without undue friction.

The stirrup-straps o c ,hooked over the pro- 5 jections *v" 011 the body0, are for the purpose of regulating the downward feed of the body byfoot-pressure of the operator.

The hook t is for the purpose of holding up the body a when the drill isnot in use. a is a water-can for supplying water to the point'of thedrill, the quantity so supplied being regulated by the cock at.

The operation is as follows: The body is allowed to slide down theguide-bars a and a until the end of the drill rests 011 the surface tobe drilled, the body then being supported by the spring 8, which isslightly compressed thereby, so that the bottom of the drill'holder isaway from the bottom of the body. Upon. turning the crank-handles r thecam g is rotated, and, acting against the rollers hh, raises the drilland holder 1' and compresses the spring 8, which causes a strain on thesquare shaft 0, as well as tends to turn the body e, so as to producesuflicient friction between the square shaft 0 and bush-bearing f, andbetween the guidebars a and a and the holes through which they pass inthe body 6, as to prevent the body and other parts from falling.

\ I11 the diagrams, Figs. 8, 9, 10, the dotted triangles represent thedevelopment of one side of the cam g, and the dotted circles one of therollers h. The projectionsn, at the commencement of rotation of the cam,bear against the side of the ribs Z, (see Fig. 8,) and slide up theseribs as the drill-holder is raised until their lower ends clear the topsof the ribs.

This occurs just before the rollers h reach the summit of the cam, thecams then forcing the projections a over the tops of the ribs Z (seeFig. 9) until they come in contact with the ribs m. The drill-holder anddrill have now made oneeleventh of a revolution, and the cams, inclearing themselves of the rollers h 71, raise the projections n a shortdistance up the side of the ribs m (See Fig. 10.) Fig. 3 also shows theparts of the machine at this time. As soon as the cams leave the rollersthe proj ections a fall down into the next spaces between the ribs Z asthe drill is forcibly driven against the rock by the spring 8, the speedof the drill being such that it reaches the rock before the body, whichis now released, has

had time to fall to interfere with the proper action of the spring 8,and the weight of the body may be so proportioned as to counteract therebound of the spring to prevent its bottom being struck by the bottomof the drillholder, so that the full force of the energy eX- pended inturning the crank-handles will be utilized in effective work. The body,with the working parts, fall together as fast as the drill cuts, so asto maintain their relative working positions. I

Instead of making the body heavy enough to produce the effect described,stirrups o o are preferably attached thereto, in which the operatorplaces his feet to offer the desired resistance to the rebound byfoot-pressure, as shown in Figs. 1 and 2.

It will be observed that the double cam g in making one revolution wouldraise the drill-holder twice, provided the drill-holder fell down withthe projections n against the same surfaces against which they areraised; but as the cam has to carry the holderzpartly around equal tothe spacing of the ribs Z, which in this case is the one-eleventh of arevolution, it is necessary that the teeth in the wheel q bear theproportion to those in the wheel 1) as thirteen is to eleven when it isdesired to produce two strokes of the drill for each full revolutionofthe crank-handles. The number of teeth of the wheels q and 1) may bearany relation to one another desired without interfering with theprinciples of operation of the machine. I11 Fig. 11 the ribs Z and m areshown as having parallel sides; but I prefer to make one side of theminclined, as shown in the other views, as the projections a slide freerup the inclined sides, and the greater strength is given to the ribs. v

The shaft 0, instead of being square, may be round, with a flat side orkeyway to work against a key fixed in the bush-bearing f.

What I claim, and desire to secure by Letters Patent, is-

1. In a rock-drilling machine, a cylindrical sliding body having aninclosing-cap, and provided with internal ribs, a drill-holder extending through the bottom of the body, and provided with ribs arranged towork against and be guided by the ribs in the body, and a cam adapted toraise the drill-holder, all on a common axis, substantially as andforthe purpose set forth. 1

2. In a rock-drilling machine, the following elements in combination,all on a common axis: a sliding body, a drill-holder arranged within andextended through the bottom of the body, a cam fitted to rotate in. theupperpart of the body, aspring located lgetween the drill-holder and thecam, and afixed rotating shaft adapted to actuate the cam in allpositions occupied by it and the body, and to hold the body stationaryby friction due to the resistance offered by the cam when thedrill-holder, is being raised thereby, substantially as set forth.

3. I11 combination, the bevel-wheels q and 19, secured, respectively, tothe shaft g, provided with crank-handles- 1', and to the shaft 0, cam g,drill-holder 11, provided with projections n, and the body 6, providedwith the ribs Z and m, the shaft 0, the cam g, the drill-holder i, andthe body 6, all being on a common axis, substantially as set forth.

4. The combination of the drill-holder i,

with projections a, spring .9, placed between the cam g andthedrill-holder i, cam g, and body e, ribsl and an, all on a commonaxis, substantially as set forth. 1

5. In a rock-drilling machine, a frame composed of the rods a a,foot-piece a head-piece (1 the actuating mechanism carried by the body6, adapted to freely slide on the rods'c a the shaft with bevel-wheelq,and bevelwheel 11, connected to the shaft 0, adapted to actuate themechanism carried by the body in all positions of the body on the rodsaa, substantially as and for the purpose set forth.

(j. In" a frame for rock-drilling machines, in combination, theguide-bars a a! head and foot pieces, a? and a, bracing-bars b and Z),curved pointed bars 0 and c, forming the rear supporting-legs of themachine, clampingyolres c c", and cross-brace b, and seat (1', attachedto the cross-brace 11, substantially as set forth. 1

7. The drill-holder of a rock-drilling ma- .chine provided withprojections, in combination with a cam, a spring located between thedrill-holder and the cam, and a sliding 'body provided .1 with ribs, all011 a common axis, whereby the drill-holder is raised to within a shortdistance of its throw, then partly rotated, then completely raised, andthen freed from the cam and forced back by the spring, substantially asand for the purpose set forth.

In witness whereof I have hereunto set my hand at New York, county andState of New York, this 25th-day of NovembenA D. 1882.

ALFRED SHElDLOCK. Witnesses:

H. D. WILLIAMS, 1 E. G. BAKER.

